Here are my favorites:
A failed engineer-now mechanical contractor wanted to borrow my meter to see why his electric fence wasn't keeping his dog in. A visit to the site showed a 2-ft. dip in the yard, next to the gate, where the unit plugged in.
A customer called to complain that the bath fan I had wired up was making noise. The man had dis-assembled the thing, then forced the fan back in the housing upside down.
Finally, a customer who had "helped" in wiring his new plant complained that some receptacles that had been working were now tripping the breaker instantly. I went nuts trying to trace the receptacles to the breaker in question. I finally realised that the receptacles could never have worked, as they never had that last piece of MC run to the panel! I found the tripping breaker was for a single receptacle that sat, unused, behind the receptionists' massive desk assembly. The unused screw on the device was touching the mud ring.
